齿轮有很多作用，但最重要的作用是动力设备的减速。
Gears do several important jobs, but most important, they provide a gear reduction in motorized equipment.
微型直流行星齿轮减速器减速电机该型号产品多用于电动工具，电动门窗，环画灯箱广告，仪器仪表以及其他传动设备。
DC micro motor deceleration planetary gear reducer the models used for power tools, electric doors and Windows, painting light box advertising ring, instrumentation, and other transmission equipment.
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